Android 自定义字体 Spannable Typeface Span

发布于 2024-10-29 03:31:09 字数 797 浏览 2 评论 0原文

我在整个应用程序中使用 Helvetica 字体。目前我正在与资产分开创建字体。所以我说过，

HelveticaNeue = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeue.ttf");
HelveticaNeueBold = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeueBold.ttf");
HelveticaNeueBoldItalic = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeueBoldItalic.ttf");

当我为一个 TextView 使用一种字体时，这三种效果都很好。但是，我需要使用 spannable

Spannable WordtoSpan = new SpannableString("This text should be normal, but this needs to be bold, and normal");    
WordtoSpan.setSpan(new TypefaceSpan("bold"), 5, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

并且我希望字符串的一部分是 HelveticaNeueBold，一些只是 HelveticaNeue。我认为需要向Android表明上面的3种字体实际上是相关的，以便它可以很好地切换它们。也在寻找其他方法来做到这一点。

原文

I am using Helvetica fonts throughout my application. Currently I am creating the fonts separately from assets. So I have say these three

HelveticaNeue = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeue.ttf");
HelveticaNeueBold = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeueBold.ttf");
HelveticaNeueBoldItalic = Typeface.createFromAsset(application.getAssets(), "fonts/HelveticaNeueBoldItalic.ttf");

Everything works great when I use one typeface for one TextView. However, I need to use a spannable

Spannable WordtoSpan = new SpannableString("This text should be normal, but this needs to be bold, and normal");    
WordtoSpan.setSpan(new TypefaceSpan("bold"), 5, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

And I want to have part of the string be HeleveticaNeueBold and some be just HelveticaNeue. I think what is needed is to indicate to Android that the 3 fonts above are actually related so that it can switch them nicely. Looking for any other way of doing this as well.

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栩栩如生 2024-11-05 03:31:09

您将需要编写一个自定义 TypefaceSpan。好消息是它们并不困难。有关示例，请参阅此处。

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↙厌世 2024-11-05 03:31:09

您可以执行以下操作：

SpannableString spannableString = new SpannableString("your text");
Typeface typeface = Typeface.create(ResourcesCompat.getFont(this, R.font.your_font);
spannableString.setSpan(
    new TypefaceSpan(typeface, Typeface.NORMAL)), 
    0, 4, 
    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

该构造函数将替换以前的文本样式，从而实现您想要的效果。然而，问题是它是在 API 28 中引入的。

You can do the following:

SpannableString spannableString = new SpannableString("your text");
Typeface typeface = Typeface.create(ResourcesCompat.getFont(this, R.font.your_font);
spannableString.setSpan(
    new TypefaceSpan(typeface, Typeface.NORMAL)), 
    0, 4, 
    Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

This constructor will replace the previous style of the text, achieving what you want. However, the catch is that it was introduced in API 28.

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